Same here, I called two months back. Call center agent told, my application is in final review queue and all steps have completed including security check.
Last month I called again, they said my file revised by second officer and they don't know how long it will take to complete.
Today I called again, they said you file is in process and they don't have the exact information where my file is and what stage is in! they simply said its in process dn't know the timeframe. I think they have lost my file! What the heck is going on!